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 https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/NetworkingTopics/Articles/UsingSocketsandSocketStreams.html#//apple_ref/doc/uid/CH73-SW1\
\
CFnetwork  https://developer.apple.com/library/prerelease/mac/documentation/Networking/Conceptual/CFNetwork/Introduction/Introduction.html#//apple_ref/doc/uid/TP30001132-CH1-DontLinkElementID_30\
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Stream   https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/Streams/Streams.html#//apple_ref/doc/uid/10000188-SW1\
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Thread   https://developer.apple.com/library/prerelease/ios/documentation/Cocoa/Conceptual/Multithreading/RunLoopManagement/RunLoopManagement.html\
\
\
Bonjour  https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/NetServices/Introduction.html#//apple_ref/doc/uid/10000119i}